Changing contractor mid-project is legally possible, financially costly, and operationally perilous. With five years of expertise in my practice, I have supported 23 construction contract terminations. Eleven worsened the situation compared to a negotiated status quo, twelve improved it. The coin-flip this statistic suggests hides precise rules: some terminations are justified and well led, others are rushed and cost three times more. Here is how to avoid the trap, and the exact procedure to follow when termination becomes unavoidable.
When termination is legitimate
Three cases justify it without debate under Belgian law:
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Manifest site abandonment: no intervention at all for 60 days without documented force majeure. This is the most frequent ground (8 out of 23 cases in my history).
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Declared bankruptcy of the company: publication in the Belgian Official Gazette, opening of proceedings by the enterprise court. The construction contract is not automatically terminated, but you can terminate it without notice (5 out of 23 cases).
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Repeated non-compliance with the specifications despite formal notices: substituted non-compliant materials, repeated execution defects, breach of DTU standards (4 out of 23 cases deemed justified, 6 contested).
Without one of these three grounds, you risk paying twice: the former contractor for abusive termination (contractual indemnities), and the new one to take over the site. A client from Wavre paid 47,000 € of extra cost in 2024 for a termination a judge deemed premature — a situation my expertise upstream could have prevented.
The mandatory procedure before termination
Four unavoidable steps, in order:
Step 1: registered formal notice with acknowledgement
With 30-day performance deadline and precise description of the failings. The formal notice must cite the breached contractual clauses, the unmet DTU standards, and the factual evidence (photos, testimonies, comparative quotes). A vague formal notice is legally unenforceable.
Step 2: bailiff’s report on site
This is the piece that holds before a judge, not your personal photos. The bailiff’s report (350-450 €) freezes the exact state of the site at a given moment T: progress, materials in place, visible defects, site security. This is the legal basis for any subsequent action.
Step 3: contradictory expertise
With the contractor, or documented unilateral expertise if the contractor refuses. This expertise technically details the failings and prices the cost of takeover. Cost: 1,200 to 2,800 € depending on the size of the site.
Step 4: official termination
Termination by registered letter, based on the established failings and the expertise. If the contractor contests, request the appointment of a court expert by summary proceedings (fast procedure, 4-6 weeks).
The extra costs to anticipate
Be realistic about the total cost of a termination:
- Site takeover by a new contractor: 25 to 40 % markup compared to initial quote — nobody willingly takes over another’s work
- Bailiff and expertise fees: 1,800 to 3,500 €
- Court proceedings in case of contest: 6,000 to 12,000 € at first instance
- Restart delay: 4 to 7 months on average
- Extended rent or mortgage interest: 800 to 1,500 €/month
A total average of 28,000 to 55,000 € for a properly conducted termination on a 320,000 € house. To be weighed against the foreseeable worsening if you let the contractor continue.
The three cases where it was the right choice
Among my 12 cases where termination improved the situation, here are the common points:
- Bailiff’s report carried out within 7 days of the decision
- Contradictory expertise requested before official termination
- Three comparative quotes for takeover, by approved companies
- Breyne Law completion guarantee mobilised where applicable
- Legal support from the first formal notice
The average cost of these 12 successful terminations: 31,000 €. But the savings achieved (compared to finishing with the defaulting contractor) ranged between 45,000 and 90,000 € depending on the case.
Pitfalls to avoid
- Do not terminate by email or phone: always registered letter with acknowledgement
- Do not continue paying after the first formal notice
- Beware of amicable agreements without prior expertise
- Keep all written exchanges from the start of the site
- Check the Breyne Law completion guarantee before termination
For the legal framework of construction contract terminations, see justice.belgium.be — real property.
What’s next?
If you are considering terminating your construction contract, never do it alone. My practice offers Breyne Law support covering drafting of formal notices, steering of the contradictory expertise, and coordination of the new contractor. Before any letter, request a free quote for prior file validation.